67% (2003)

52% (2005)

69% (2004)

66% (2005)

51% (2006)

61% (2012)

70% (2007)

62% (2005)

57% (2012)

60% (2017)

65% (2017)

54% (2008)

58% (2005)

46% (2008)

62% (2012)

61% (2010)

69% (2007)

68% (2009)

71% (2014)

56% (2018)